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USGS Daily Statistics for California

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 11530000 TRINITY R A HOOPA CA


Humboldt County, California
Hydrologic Unit Code 18010211
Latitude  41°03'00", Longitude 123°40'21" NAD27
Drainage area 2,853  square miles
Gage datum 274.82 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1963-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 8,440 9,090 9,720 8,760 6,420 4,430 1,960 916 830 711 1,130 4,380
2 7,620 8,960 9,950 8,510 6,320 4,270 1,920 899 803 690 1,140 4,710
3 6,750 8,890 10,200 7,980 6,270 4,130 1,850 881 810 697 1,180 4,730
4 6,790 8,420 9,310 7,520 6,240 4,050 1,790 866 795 696 1,130 4,640
5 7,010 8,260 9,180 7,270 6,350 3,990 1,750 849 784 702 1,180 5,130
6 7,250 8,500 9,540 7,230 6,270 3,860 1,710 834 804 703 1,300 4,940
7 6,860 9,270 9,060 7,510 6,240 3,760 1,670 825 774 702 1,500 5,020
8 7,770 9,020 9,320 7,350 6,190 3,620 1,630 817 755 701 1,710 5,240
9 8,790 9,010 10,100 7,170 6,180 3,480 1,600 806 746 701 1,860 5,190
10 8,610 8,870 10,200 6,890 6,040 3,370 1,560 794 781 726 2,050 5,850
11 8,830 8,290 9,810 7,040 5,920 3,280 1,510 786 768 765 2,670 5,780
12 9,220 7,970 9,460 7,090 5,790 3,210 1,470 777 741 746 2,450 5,600
13 10,800 8,790 10,300 7,090 5,680 3,190 1,430 767 726 733 2,360 5,700
14 12,000 9,700 10,700 6,960 5,680 3,140 1,380 760 741 740 2,320 6,570
15 12,300 9,660 10,400 6,660 5,640 3,100 1,320 764 731 770 2,360 6,960
16 13,200 9,650 9,950 6,550 5,640 2,990 1,280 762 722 785 2,740 6,750
17 14,300 10,500 9,760 6,670 5,520 2,880 1,260 756 723 801 2,830 6,330
18 12,800 11,100 9,740 6,840 5,530 2,770 1,250 777 765 755 2,520 5,330
19 11,900 10,800 9,400 6,760 5,570 2,690 1,220 774 792 799 2,500 6,150
20 12,100 11,200 8,880 6,570 5,380 2,600 1,180 762 788 826 2,710 6,700
21 12,600 10,600 8,720 6,490 5,170 2,500 1,150 759 761 780 2,710 8,000
22 11,900 10,000 8,880 6,410 5,100 2,420 1,120 794 744 824 3,040 9,750
23 11,400 9,650 9,400 6,430 4,990 2,360 1,090 784 727 1,000 3,340 8,950
24 11,100 8,870 9,300 6,630 4,830 2,290 1,070 787 702 1,140 3,990 7,590
25 9,900 8,480 9,570 6,500 4,720 2,230 1,050 811 703 1,340 3,840 6,620
26 10,700 8,800 9,810 6,300 4,590 2,190 1,030 825 710 1,230 3,260 6,330
27 11,600 9,860 9,000 6,350 4,620 2,170 1,000 850 719 1,050 3,170 6,780
28 10,200 9,890 8,930 6,440 4,680 2,130 991 859 707 1,040 3,480 7,910
29 9,770 12,400 8,630 6,470 4,560 2,100 981 835 719 1,110 3,540 7,630
30 9,520   9,700 6,540 4,430 2,010 963 867 741 1,190 3,730 8,500
31 8,990   9,320   4,540   941 887   1,210   9,720